RNA: support setting default values for custom properties.

NLA requires a usable default value for all properties that
are to be animated via it, without any exceptions. This is
the real cause of T36496: using the default of 0 for a scale
related custom property obviously doesn't work.

Thus, to really fix this it is necessary to support configurable
default values for custom properties, which are very frequently
used in rigs for auxiliary settings. For common use it is enough
to support this for scalar float and integer properties.

The default can be set via the custom property configuration
popup, or a right click menu option. In addition, to help in
updating old rigs, an operator that saves current values as
defaults for all object and bone properties is added.

Reviewers: campbellbarton, brecht

Differential Revision: https://developer.blender.org/D4084

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/makesrna/RNA_access.h b/source/blender/makesrna/RNA_access.h
index f6bfcb2bb32..03a879c9cf7 100644
--- a/source/blender/makesrna/RNA_access.h
+++ b/source/blender/makesrna/RNA_access.h
@@ -952,6 +952,7 @@ int RNA_property_int_get_index(PointerRNA *ptr, PropertyRNA *prop, int index);
 void RNA_property_int_set_array(PointerRNA *ptr, PropertyRNA *prop, const int *values);
 void RNA_property_int_set_index(PointerRNA *ptr, PropertyRNA *prop, int index, int value);
 int RNA_property_int_get_default(PointerRNA *ptr, PropertyRNA *prop);
+bool RNA_property_int_set_default(PointerRNA *ptr, PropertyRNA *prop, int value);
 void RNA_property_int_get_default_array(PointerRNA *ptr, PropertyRNA *prop, int *values);
 int RNA_property_int_get_default_index(PointerRNA *ptr, PropertyRNA *prop, int index);
 
@@ -963,6 +964,7 @@ float RNA_property_float_get_index(PointerRNA *ptr, PropertyRNA *prop, int index
 void RNA_property_float_set_array(PointerRNA *ptr, PropertyRNA *prop, const float *values);
 void RNA_property_float_set_index(PointerRNA *ptr, PropertyRNA *prop, int index, float value);
 float RNA_property_float_get_default(PointerRNA *ptr, PropertyRNA *prop);
+bool RNA_property_float_set_default(PointerRNA *ptr, PropertyRNA *prop, float value);
 void RNA_property_float_get_default_array(PointerRNA *ptr, PropertyRNA *prop, float *values);
 float RNA_property_float_get_default_index(PointerRNA *ptr, PropertyRNA *prop, int index);
 
@@ -1015,6 +1017,7 @@ bool RNA_property_collection_move(PointerRNA *ptr, PropertyRNA *prop, int key, i
 /* copy/reset */
 bool RNA_property_copy(struct Main *bmain, PointerRNA *ptr, PointerRNA *fromptr, PropertyRNA *prop, int index);
 bool RNA_property_reset(PointerRNA *ptr, PropertyRNA *prop, int index);
+bool RNA_property_assign_default(PointerRNA *ptr, PropertyRNA *prop);
 
 /* Path
  *